Subsonic-Supersonic Supersonic-?

  • Thread starter H_man
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Subsonic-Supersonic... Supersonic--?

Hi all,

I was just wondering.. in the case of the Laval nozzle you go from subsonic to supersonic. But once your flow is already supersonic is there any sense in having a physical nozzle (as surely there is still some divergence to the exhaust) or would it just impede flow? I am thinking about use above the atmosphere.

Cheers,

Harry
 

russ_watters

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The flow continues to expand and accelerate, guided by the nozzle. There is an optimal nozzle length, though, and some nozzles are actually extendable: http://www.braeunig.us/space/sup1.htm
 
Last edited:
145
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Thanks, thats a great website.

I now see you need different nozzles for different missions depending on the altitude.
 

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